SUNTES DB-2021S
DB-2021SB-1.3/8R DB-2021SB-2.1/8R B Mean: USE Vegetable oil
DB-2021SK-1.3/8R DB-2021SK-2.1/8R B Mean: USE Mineral oil



old sumitomo brake and new suntes type:
MK21S 2 1/8KR AND DB2021SK-21/8R